More and more teenagers have poor eyesight, so parents and teachers should take actions the situation from getting worse.( )
A.stopB.stoppingC.stoppedD.to stop
-____you ever ____with a group? -Yes, I have .
---_______ he _______ from Beijing? ---No, he _______.
------ __ does your father go to see your grandmother ? ------Once a month .
study in Lufu Middle School?
I always tell my students _________ on the road because it’s really dangerous.